<?php
/*************************
说明：
判断传递的变量中是否含有非法字符
如$_POST、$_GET
功能：
防注入
**************************/

//要过滤的非法字符
$ArrFiltrate=array("select","insert","update","delete","\'","\/\*","\*","\.\.\/","\.\/","union","into","load_file","outfile","'",";");
//出错后要跳转的url,不填则默认前一页
$StrGoUrl="";
//是否存在数组中的值
function FunStringExist($StrFiltrate,$ArrFiltrate){
foreach ($ArrFiltrate as $key=>$value){
    if (eregi($value,$StrFiltrate)){
        return true;
    }
  }
return false;
}

//合并$_POST 和 $_GET
if(function_exists(array_merge)){
    $ArrPostAndGet=array_merge($HTTP_POST_VARS,$HTTP_GET_VARS);
}else{
    foreach($HTTP_POST_VARS as $key=>$value){
        $ArrPostAndGet[]=$value;
    }
    foreach($HTTP_GET_VARS as $key=>$value){
        $ArrPostAndGet[]=$value;
    }
}

//验证开始
foreach($ArrPostAndGet as $key=>$value){
    if (FunStringExist($value,$ArrFiltrate)){
        echo "<script language=\"javascript\">alert(\"非法字符\");</script>";
        if (empty($StrGoUrl)){
        echo "<script language=\"javascript\">history.go(-1);</script>";
        }else{
        echo "<script language=\"javascript\">window.location=\"".$StrGoUrl."\";</script>";
        }
        exit;
    }
}


?>

